JAV48

I went to the house of my first girlfriend 'Kana-chan'. In the living room was a large photo of a cult leader, and I was told that everyone in the family except Kana-chan was a fanatic believer. Of course, that doesn't change my love for Kana-chan. Just as we were getting into a good mood, Kana-chan's brother came home. We're about to perform an important ring ceremony, so I'm sorry, but could you please go home today?" I have no intention of disturbing the family's faith, so let's go home for today. But what is the "ring ceremony"? I feel a bit uneasy....